Area Forecast Discussion
Issued by NWS Spokane, WA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS66 KOTX 220043
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
543 PM PDT Sat Apr 21 2018

.SYNOPSIS...
Winds will decrease this evening allowing temperatures to be
chilly tonight with most areas dipping into the 30s. Much of next
week is expected to be dry with our warmest weather of the spring
season thus far. By Thursday and Friday, some of our lowland areas
will have a shot of reaching 80 degrees or more.

&&

.DISCUSSION...
An early evening update to increase cloud cover this evening with
an extensive area of orographic opaque cirrus over the region.
Otherwise remainder of discussion below remains valid.  JW

&&

.AVIATION...
00Z TAFS: Winds will be on the decrease between 1-3z this evening
as pressure gradients begin to ease and mixing potential
decreases. Otherwise expect flat cumulus to dissipate this evening
as the lower atmosphere stabilizes with mainly high level clouds
expected through Sunday.  JW


&&

.PREV DISCUSSION... /issued 440 PM PDT Sat Apr 21 2018/

Tonight: Gusty winds will quickly subside this evening. The
frontal system that moved through the Inland Northwest early this
morning will be well into eastern Montana by early evening. With
weak surface pressure gradient, our region will experience light
winds and mainly clear skies. Look for overnight lows to tumble
into the 30s with pockets of 20s in our sheltered valleys of north
Idaho and northern Washington. Places like Republic, Deer Park,
Priest Lake, and Springdale will likely dip into the upper 20s.

Sunday through Tuesday: The main branch of the Polar Jet will
migrate well north of our region early next week. A weak
shortwave on Sunday will produce clouds and the threat of showers
for central Idaho, but the Inland Northwest will remain dry. By
Monday and Tuesday, a high pressure ridge will bring much warmer
temperatures. Look for 60s and low 70s on Monday and widespread
70s by Tuesday. /GKoch

Wednesday through Saturday: A strong ridge of high pressure will
firmly be in place by Wednesday of next week. A cutoff low will
also be circulating off of the coast of California at this same
time. No precipitation is expected Wednesday and Thursday.
Temperatures will make a steady climb to well above normal by mid
week. Moisture will start to spread across the state of OR on
Friday with a slight chance of thunderstorms possibly getting into
the Northeast Blue Mtns for the afternoon/evening. The Friday or
Saturday time frame looks to be our warmest days of the upcoming
week. Widespread high temperatures into the 80s is not out of the
question for Friday. There is much more model discrepancy for next
weekend resulting in a much lower confidence forecast. The 12Z
ECMWF solution ejects the cutoff low off of California faster with
clouds and precip moving up across the region by Saturday. The
GFS and Canadian solutions are slower to eject the low and keeps
the center of the low south of the region. These solutions would
keep much of the clouds and precip away and temperatures much
warmer. The ECMWF solution is an outlier, but can`t be discounted.
The ECMWF solution would also result in a better chance for
thunderstorms if it indeed verifies. /SVH

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        33  57  36  65  39  71 /   0   0   0   0   0   0
Coeur d`Alene  33  56  34  64  36  70 /   0   0   0   0   0   0
Pullman        32  55  33  63  37  70 /   0   0   0   0   0   0
Lewiston       38  63  39  69  40  77 /   0   0   0   0   0   0
Colville       32  61  32  69  34  74 /   0   0   0   0   0   0
Sandpoint      31  55  33  62  34  68 /   0   0   0   0   0   0
Kellogg        32  55  34  62  34  70 /   0   0   0   0   0   0
Moses Lake     36  63  34  69  38  75 /   0   0   0   0   0   0
Wenatchee      39  62  39  68  42  73 /   0   0   0   0   0   0
Omak           35  62  36  69  38  75 /   0   0   0   0   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.

&&

$$


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.